Malcolm and Hedgehog Linux may be obtained by pulling or building the Docker images and/or building the ISO installer images as described in the documentation. Unofficial ISO installer images for Malcolm and Hedgehog Linux are not hosted on Github, but may be downloaded from https://malcolm.fyi/download/.
This is security patch release which is identical to v2.0.0 except that Zeek has been bumped from v3.0.3 to v3.0.5 to address a security vulnerability (see Malcolm issue #123, and Zeek commit zeek/zeek@bb3250c).